Modeling the Earthquake-Induced Landslide Hazard Assessment Based on the Cumulative Displacement Method Incorporating Topographic Amplification and Sliding Area Effects
| Autor: | Wen-Fei Peng, 彭文飛 |
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| Rok vydání: | 2008 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 96 A procedure that considers topographic effects and runout behavior is proposed for analyzing seismic landslide hazards. The theoretical topographic amplification factors and corresponding amplified ground motion are calculated. By using the amplified motion, a cumulative displacement map is generated through Newmark’s displacement method. The high displacement areas are defined as the source areas of landslides. A runout simulation that identifies sliding routes and the final deposition areas of the sliding material from these source areas is performed. Finally, the complete set of landslide zones, including source, and sliding and deposition areas, is predicted. Three landslide hazard maps of the 99 Peaks region, Mt. Yan region and Mt. Baishiya region are evaluated, and the maps of actual landslides triggered by the September 21, 1999, Chi-Chi earthquake are compared with the prediction. Relative to the conventional procedure, the results show that the proposed procedures which include the topographic effect can obtain a better result for predicting the source area of landslides. And the proposed procedures, which combines topographic effects and runout simulation, can generate more accurate predictions for predicting the complete set of landslide zones, including source, and sliding and deposition areas. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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